Charles hicks



(No Model.)

0. HICKS.

TURN TABLE EXTENSION LADDER TRUCK. No. 383,731. 8 Patented May 29, 1888.

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'NITED STATES PATENT OFFrcE.

CHARLES HICKS, OF CHICAGO, ILLINOIS, ASSIGNOR TO EVERETT B. PRESTON, OF SAME PLACE.

TURN-TABLE EXTENSION-LADDER TRUCK.

SPECIFICATION forming part of Letters Patent No. 383,731, dated May 29, 1888.

I Application filed March 8, 1888. Serial No. 266,599. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES HIcKs, a citizen of the United States, residing in Chicago, inthe county of Cook and State of Illinois, have invented a new and useful Improvement in Turn-Table Extension-Ladder Trucks, of which the following is a specification.

My invention relates to turn-table extensionladder trucks used by fire-departments, and more particularly to improvements in the mechanism for raising and lowering the main or pivoted ladder.

The invention consists in the novel devices and novel combinations of devices herein shown and described, and more particularly pointed out in the claims.

In the accompanying drawings, which form a part of this specification, and in which similar letters of reference indicate like parts, Figure 1 is a side elevation of a device embodying my invention. Fig. 2 is a plan view,and Fig. 3 is a section on line 3 3 of Fig. 2.

In said drawings, A represents the wheeled truck; B, the stationary ring of the turn-table secured thereto; 13, the revolving ring of the turn-table, and C the main ladder. The extension-ladders are not shown, as my inventiondoes not relate thereto.

Dis a screw having right and left threads d d. It is journaled in suitable bearings, D, on the turn-table.

E E are nuts threaded upon the screw, to one of which, E, the side bars, a, of the ladder are pivoted, and to the other of which, E, the lifting-links F F are pivoted. The links F F are pivoted to the ladder side bars, a, said side bars being furnished with upwardlyprojecting ears or brackets 0, through which the pivot-shaft f passes. The nuts E E are made long or in the form of cross bars, and are furnished with friction-rollers e,which ride upon the guide bars orsupports G G, secured to the upper ring of the turn-table. The togglearm links F F are made somewhat longer than the distance from the pivot-shaftf to the pivot-nut E, so that when the nuts are brought together by operation of the screw the ladder may be raised to a vertical position, as indicated by the dotted lines in Fig. 1. r

The upwardly-projecting lugs c on the ladder serve to prevent the toggle-arms F c or their three pivots, E f E, from approximating too close to a straight line when the ladder C is in its lowermost position. As will be observed from Fig. 1, I do not lower the ladder quite to a horizontal position, the outer end of the ladderbeing preferably elevated about four feet above the level of the truck-frame, as is customary, by the standards or supports at the back end of the truck-frame.

H H are guide braces or supports secured to the turn-table at each side of the ladder. These guide-braces are furnished with a slot, h, curved to the path of the roller or projection 0 on the ladder, through which the roller or projection 0 projects, so as to guide and steady and brace the ladder when raised and while being raised.

If the nut cross-bars E E should be somewhat lengthened and the guide-bars G G correspondingly separated, the slotted braces H H maybe omitted; but it is preferable to employ these slotted braces. The screw has a squared end, d to receive a crank, and it is also furnished with bevel-gears cl (1*, which mesh with bevel-gears d on the four crankshafts (1.

Instead of a ladder, my invention may be used for raising a water-tower or other pivoted structure.

I claim 1 The combination,with a turn-table truck, of guide-bars G G, right-and-left screw D, nuts E E, ladder C, pivoted to one of said nuts,and link F, pivoted to the other of said nuts and to the ladder, substantially as specified.

2. The combination,with a turn-table truck, of guide-bars G G, right-aud-left screw D, nuts E E, ladder C, pivoted to one of said nuts, and

link F, pivoted to the other of said nuts and to theladder, said link F being longer than the distance between the two pivots on the ladder, substantially as specified.

3. The combination,with a turn-table truck, of guide-bars G G, right-and-left screw D, nuts E E, ladder C, pivoted to one of said nuts,and link F, pivoted to the other of said nuts and to the ladder, and guide-braces H H, secured to the turn-table on each side of the ladder, substantially as specified.

4. The combination,with a turn-table truck,

of guide-bars G G, right-and-left screw D, nuts E E, ladder O, pivoted to one of said nuts,and

link F, pivoted to the other of said nuts and to 5 the laddcr,said nuts E Ebeing furnished with friction-rollers to roll on said guide'bars G G, substantially as specified.

5. The combination,with a truck,of a right and-left screw, a pair of nuts, a structure piv- IO oted to one of said nuts, and a link pivoted at one end to said structure and at the other to the other of said nuts, substantially as specified.

6. The combiuation,with a turntable truck,

CHARLES HICKS.

Witnesses:

H. M. MUNDAY, EDMUND AnoooK. 

